You might have them a bit high. Ideally the end of the curved guide where the cable emerges to head off towards the wheel needs to lie on the axis that the lever end is rotating about as the wheel moves up and down. That is approximately a line joining the centre of the driveshaft universal joint and the front end joint of the trailing arm that is fastened to the chassis outrigger. A quick way to test is to take off the rear spring and raise/lower the wheel and see if the cable becomes slacker or tighter. As you have it at the moment I would expect one side to cancel out the other when the car rolls in cornering, slacken both sides when going through a dip and tighten when airbourne!
|